Brian: Created page with "==Memcached List all Keys== In the general case, there is no way to list all the keys that a memcached instance is storing. You can, however, list something like the first 1M..."

2015-08-22T14:43:24Z

Created page with "==Memcached List all Keys== In the general case, there is no way to list all the keys that a memcached instance is storing. You can, however, list something like the first 1M..."

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==Memcached List all Keys==

In the general case, there is no way to list all the keys that a memcached instance is storing. You can, however, list something like the first 1Meg of keys, which is usually enough during development.

===Connect to your Memcached Instance===

We have multiple ways to set up memcache instances (tcp or socket)

====Connect to Memcached TCP Instance====

telnet 127.0.0.1 11211

====Connect to Memcached Socket Instance ====

nc -U /path/to/socket

===Now we need to get the slab ids===

List the items to get the slab id:

stats items

STAT items:5:number 2
STAT items:5:age 1390736
STAT items:5:evicted 0
STAT items:5:evicted_nonzero 0
STAT items:5:evicted_time 0
STAT items:5:outofmemory 0
STAT items:5:tailrepairs 0
STAT items:6:number 260
STAT items:6:age 1385409
STAT items:6:evicted 0
STAT items:6:evicted_nonzero 0
STAT items:6:evicted_time 0
STAT items:6:outofmemory 0
STAT items:6:tailrepairs 0

The first number after ‘items’ is the slab id. Request a cache dump for each slab id, with a limit for the max number of keys to dump:

stats cachedump 3 100
ITEM views.briansnelson.cache.cache_header..cc7d9 [6 b; 1256056128 s]
END

stats cachedump 22 100
ITEM views.briansnelson.cache.cache_page..8427e [7736 b; 1256056128 s]
END

Now you should be able to list and view the keys

Memcached List all Keys - Revision history

Brian: Created page with "==Memcached List all Keys== In the general case, there is no way to list all the keys that a memcached instance is storing. You can, however, list something like the first 1M..."